I absoluty hate the idea.
I think for my guild (and tbh alot of guilds will feel the same about it) it will ruin alot of the social aspect of the game. 25's are for alot of guilds just for the fun and not even for the loot. Missing out on the fun on vent ect. That would be such a shame. Since well, same loot, 15 less people to screw up. Easy choice.